Free Respiratory practice for NEET PG and INI-CET Physiology, with a written explanation on every question.
7 questions · Free explanations
Showing 1–7 of 7 questions
Q1 · Oxygen Dissociation Curve
NEET PGMediumExplanation
A right shift, meaning easier oxygen unloading, is caused by increased 2,3-BPG, carbon dioxide, temperature and hydrogen ions, that is a low pH. This is the Bohr effect.
Q2 · Lung Volumes
NEET PGEasyExplanation
Residual volume, the air remaining after maximal expiration, cannot be measured by spirometry and needs body plethysmography or helium dilution. Consequently functional residual capacity and total lung capacity cannot be measured directly either.
Q3 · Obstructive and Restrictive Patterns
NEET PGMediumExplanation
Obstructive disease such as asthma and COPD reduces the FEV1/FVC ratio because airflow is limited. Restrictive disease reduces both FEV1 and FVC proportionally, keeping the ratio normal or high.
Q4 · Pulmonary Surfactant
EasyExplanation
Surfactant reduces alveolar surface tension, increasing compliance and preventing alveolar collapse at end-expiration. Its deficiency in premature infants causes respiratory distress syndrome.
Q5 · Control of Respiration
HardExplanation
Central chemoreceptors respond to CSF hydrogen ion changes driven by arterial PaCO2, the most powerful normal respiratory stimulus. Hypoxic drive via peripheral chemoreceptors becomes important only at low PaO2 or in chronic carbon dioxide retainers.
Q6 · Carbon Dioxide Transport
MediumExplanation
About 70% of carbon dioxide is carried as bicarbonate, formed via carbonic anhydrase in red cells, about 23% as carbaminohaemoglobin and about 7% dissolved. The bicarbonate system also buffers blood pH.
Q7 · Types of Hypoxia
HardExplanation
Carbon monoxide poisoning causes anaemic, or haemic, hypoxia by binding haemoglobin with about 240 times the affinity of oxygen, reducing oxygen-carrying capacity. It also shifts the dissociation curve left, worsening tissue delivery.
Respiratory sits within Physiology, which carries the same syllabus in both exams. This set runs to 7 questions, each tagged Easy, Medium or Hard, 2 of them at Hard, and 3 drawn from previous-year papers.
Answer first, then read the explanation even on the ones you got right — the reasoning is where Respiratory marks are actually won, and it is what separates a recalled fact from a question you can solve in a new form. Once the Easy set feels comfortable, filter to Hard to find the gaps Physiology examiners keep returning to.
FAQ
Yes. Every question and explanation in this Respiratory set is free and open — no login, no form and no payment. The explanation appears the moment you answer.
Respiratory sits within Physiology, which appears in the same form in both syllabuses. System-wise physiology with the mechanisms examiners test most: cardiac and respiratory regulation, renal handling, endocrine axes and nerve conduction.
No. No account, no password, no OTP. Answer in the browser and your answers stay on your device for the session.